EMS-ESP32/interface/src/api/Env.ts

export const PROJECT_NAME = process.env.REACT_APP_PROJECT_NAME!;
export const PROJECT_PATH = process.env.REACT_APP_PROJECT_PATH!;

export const ENDPOINT_ROOT = calculateEndpointRoot('/rest/');
export const WEB_SOCKET_ROOT = calculateWebSocketRoot('/ws/');
export const EVENT_SOURCE_ROOT = calculateEndpointRoot('/es/');
export const API_ENDPOINT_ROOT = calculateEndpointRoot('/api/');

function calculateEndpointRoot(endpointPath: string) {
  const httpRoot = process.env.REACT_APP_HTTP_ROOT;
  if (httpRoot) {
    return httpRoot + endpointPath;
  }
  const location = window.location;
  return location.protocol + '//' + location.host + endpointPath;
}

function calculateWebSocketRoot(webSocketPath: string) {
  const webSocketRoot = process.env.REACT_APP_WEB_SOCKET_ROOT;
  if (webSocketRoot) {
    return webSocketRoot + webSocketPath;
  }
  const location = window.location;
  const webProtocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
  return webProtocol + '//' + location.host + webSocketPath;
}